Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 16-08-2021 and time 11:43:25 (Italy) in region 8 km NW Sellano (PG)

A magnitude ML 0.6 earthquake occured in region: 8 km NW Sellano (PG), on

  • 16-08-2021 09:43:25 (UTC)
  • 16-08-2021 11:43:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9560, 12.8900 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sellano PG 8 1079 1079
Monte Cavallo MC 10 145 1224
Serravalle di Chienti MC 14 1070 2294
Trevi PG 14 8469 10763
Preci PG 15 724 11487
Foligno PG 15 57155 68642
Cerreto di Spoleto PG 15 1075 69717
Valtopina PG 16 1398 71115
Pieve Torina MC 16 1458 72573
Visso MC 16 1107 73680
Campello sul Clitunno PG 18 2442 76122
Spello PG 18 8645 84767
Fiordimonte MC 19 202 84969
Muccia MC 19 915 85884
Nocera Umbra PG 19 5839 91723
Pievebovigliana MC 20 866 92589

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Foligno (57155 inhabitants)
44 Km E of Perugia (166134 inhabitants)
48 Km NE of Terni (111501 inhabitants)
74 Km W of Teramo (54892 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
99 Km S of Fano (60888 inhabitants)
99 Km SE of Arezzo (99543 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 0.6 2021-08-16
09:43:25		 42.9562 12.89 10 2021-12-29
11:12:21		 Bollettino Sismico Italiano INGV 94401881
Reviewed
Rev100 		ML 1.0 2021-08-16
09:43:25		 42.9577 12.8932 10 2021-08-16
10:00:05		 Sala Sismica INGV-Roma 94246711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-16 09:43:25 ± 0.1
Latitude 42.9562 ± 0.0054
Longitude 12.8900 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 94401881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 518
Semi-minor axis of confidence ellipse (meter) 396
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 36
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 170
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.29228
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.6
Num. used stations 11
Type of magnitude ML
Reference to an origin 94246711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-16 10:00:05

ML:0.6

Field Value
Value 0.6
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 94401881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-20 05:37:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LADO.EHZ. 2021-08-16T09:44:52.65 3.0 undecidable manual Sn -4.34 0
IV.ZEN8.EHZ. 2021-08-16T09:44:47.27 3.0 undecidable manual Sn -6 0
IV.STAL.HHZ. 2021-08-16T09:44:26.31 3.0 undecidable manual Pg 16.33 0
GU.RORO.HHZ. 2021-08-16T09:44:23.13 3.0 positive manual Pg 11.68 0
IV.MAGA.HHZ. 2021-08-16T09:44:21.31 3.0 positive manual Pg 12.06 0
IV.PTRP.HHZ. 2021-08-16T09:44:20.87 3.0 undecidable manual Sn -4.44 0
IV.SPS2.HHZ. 2021-08-16T09:44:19.31 3.0 positive manual Pg 14.5 0
IV.ZEN8.EHZ. 2021-08-16T09:44:17.56 3.0 undecidable manual Pg 10.38 0
IV.MTMR.EHZ. 2021-08-16T09:44:15.94 3.0 undecidable manual Sg 9.93 0
IV.IMOL.HNZ. 2021-08-16T09:44:13.93 3.0 undecidable manual Sn -5.36 0
OX.CIMO.HHZ. 2021-08-16T09:44:09.28 3.0 undecidable manual Pn -1.65 0
IV.VOBA.EHZ. 2021-08-16T09:44:08.87 3.0 negative manual Pn 0.6 0
IV.NDIM.HHZ. 2021-08-16T09:44:06.59 3.0 undecidable manual Pg 8.77 0
IV.CMIS.HHZ. 2021-08-16T09:43:57.70 3.0 undecidable manual Sn -1.97 0
IV.AGLI.HHZ. 2021-08-16T09:43:54.07 3.0 undecidable manual Pn -3.47 0
IV.BSSO.HHZ. 2021-08-16T09:43:52.15 3.0 undecidable manual Sn -1.44 0
IV.MTMR.EHZ. 2021-08-16T09:43:49.01 3.0 undecidable manual Pg 8.38 0
IV.FIR.HHZ. 2021-08-16T09:43:49.86 3.0 undecidable manual Pg 5.42 0
IV.CDRU.HHZ. 2021-08-16T09:43:47.85 3.0 undecidable manual Pn 1.53 0
IV.RIBO.EHZ.01 2021-08-16T09:43:44.60 3.0 undecidable manual Pg 4.79 0
IV.PP3.EHZ. 2021-08-16T09:43:40.64 3.0 negative manual Pg 6.48 0
IV.ATCC.EHZ. 2021-08-16T09:43:37.26 0.6 undecidable manual S 321 32.4453 50 0.07 48
IV.PAOL.HHZ. 2021-08-16T09:43:36.88 3.0 undecidable manual Pn -0.13 0
IV.MC2.EHZ. 2021-08-16T09:43:35.17 0.3 undecidable manual S 101 24.753 50 0.04 74
IV.NRCA.HHZ. 2021-08-16T09:43:34.31 0.3 undecidable manual S 127 22.755 114 -0.22 72
IV.MML1.EHZ. 2021-08-16T09:43:33.21 0.3 undecidable manual S 21 18.6702 119 -0.05 74
IV.ASSB.HHZ. 2021-08-16T09:43:33.77 0.1 undecidable manual S 297 21.0678 116 -0.23 95
IV.ATCC.EHZ. 2021-08-16T09:43:32.39 0.6 undecidable manual P 321 32.4453 50 -0.02 48
IV.BSSO.HHZ. 2021-08-16T09:43:32.99 3.0 undecidable manual Pn -0.66 0
IV.FDMO.HHZ. 2021-08-16T09:43:32.82 0.3 undecidable manual S 61 18.3705 119 -0.34 70
IV.MC2.EHZ. 2021-08-16T09:43:31.80 0.3 undecidable manual P 101 24.753 50 0.58 65
IV.NRCA.HHZ. 2021-08-16T09:43:30.77 0.1 undecidable manual P 127 22.755 114 -0.1 97
IV.FDMO.HHZ. 2021-08-16T09:43:30.02 0.3 undecidable manual P 61 18.3705 119 -0.06 74
IV.CESI.HNE. 2021-08-16T09:43:30.13 0.3 undecidable manual S 12 5.4945 152 0.22 72
IV.MML1.EHZ. 2021-08-16T09:43:30.11 0.1 undecidable manual P 21 18.6702 119 -0.03 99
IT.MTCL.HGN. 2021-08-16T09:43:30.74 0.3 undecidable manual S 65 9.7791 136 -0.06 76
IV.ASSB.HHZ. 2021-08-16T09:43:30.56 0.1 undecidable manual P 297 21.0678 116 -0.01 99
IT.MTCL.HGN. 2021-08-16T09:43:28.77 0.1 undecidable manual P 65 9.7791 136 0.05 100
IV.CESI.HNE. 2021-08-16T09:43:28.53 0.1 undecidable manual P 12 5.4945 152 0.32 95
IV.RMP.HHZ. 2021-08-16T09:43:27.03 3.0 positive manual P -0.7 0
IV.LRP.EHZ. 2021-08-16T09:43:24.06 3.0 negative manual Pn -4.22 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FDMO.HHN. ML:0.5 0.00002625 1.56 AML other m 2021-08-16T09:43:32.21
IV.FDMO.HHE. ML:0.6 0.00003015 0.38 AML other m 2021-08-16T09:43:33.29
IV.MML1.EHN. ML:0.5 0.000022499999999999998 0.72 AML other m 2021-08-16T09:43:33.02
IV.MML1.EHE. ML:0.7 0.00003945 0.2 AML other m 2021-08-16T09:43:33.42
IV.NRCA.HHE. ML:0.7 0.00003594999999999999 0.16 AML other m 2021-08-16T09:43:34.80
IV.NRCA.HHN. ML:0.8 0.000045249999999999995 0.86 AML other m 2021-08-16T09:43:35.17
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download